LEIBNIZ, Gottfried Wilhelm. Extracts from Acta eruditorum. Leipzig, 1682-1723. 4o. Many engraved folding plates. Provenance: Humanities Research Center, University of Texas; from the Library of Haskell F. Norman (bookplates). Includes: "De dimensionibus figurarum inveniendis," May 1684. -- "Demonstrationes novae de resistencia solidorum," July 1684. -- "Nova calculi differentialis applicatio et usus ad multiplicem linearum constructionem..." July 1694; "Constructio propria problematis naturae legibus circae corporum vires..." August 1694. -- "De lineis opticus et alia," January 1689; "Schediasma de resistencia medii et motu projectorum gravium in medio resistente," January 1689; "Tentamen de motuum coelestium causis," February 1689. -- "De linea isochrona in qua grave sine acceleratione descendit et de controversia," April 1689. -- "Mechanicorum de viribus mortricibus sententia asserta a D. Papino adversus," January 1691; BERNOUILLI, J. "Specimen calculi differentialis in dimensione parabolae helicoidis ubi de flexurus curvarum in genere carundem evolutionibus aliisque," January 1691; "O.V.E. Additio ad schediasma de medii resistentia publicatum in actis mensis," April 1691. -- "De linae super linea incessu ejusque tribus speciebus motu radente..." January 1706. -- "De linae in quam flexile se pondere propitio curvat ejusque usu insigni ad inveniendas quotcunque medias proportionales et logarithmos," June 1691; HUYGENS, Christian. "Dynastae in zülechem, solutio ejusdem problematis," June 1691; BERNOUILLI, J. "Specimen alterum calculi differentialis in dimentienda spirali logarithmica..." June 1691; BERNOUILLI, J. "Demonstratio centri oscillationes ex natura vectis..." July 1691. -- "De solutionibus problematis catenariivel funicularis in actis Junii A 1691," September 1691; BERNOUILLI, Johanne. "Solutio curvae causticae per vulgarem geometriam cartesianam," January 1692. -- "Generalis de natura linearum anguloque contactus..." September 1692; BERNOUILLI, J. "Solutio problematis de minimo crepusculo," June 1693; BERNOUILLI, J. "Solutio problematis fraterni ante octiduum lipsiam transmisi," June 1693. -- "Specimen novum analyses pro scientia infinitis circa summas et quadraturas," May 1702. -- "Continuatio analyseos quadraturarum rationalium..." January 1703. -- "Communicatio suae pariter daurumque alienarum ad edendum sibi primum a Dn. Jo. Bernouilli deinde a Dn. Marchione Hospitalio communicatarum solutionum problemati curvae celerrimi descensus..." May 1697; BERNOUILLI, Joh. "Curvatura radii in diaphanis non uniformibus..." May 1697; BERNOUILLI, Jac. "Solutio problematum fraternorum peculiari programmate..." May 1697; L'HOSPITAL, Guillaume. "Solutio problematis de linea celerrimi descensus," May 1697. -- "Specimen dynamicum pro admirandis naturae legibus circae corporum vires..." April 1695. -- "De vera proportione circuli ad quadratum circumscriptum in numeris rationalibus," February 1682. -- "Constructio testudinis quadrabilis hemisphacricae," June 1692. -- "Supplementum geometriae dimensoriae, seu generalissima omnia tetragonismorum effectio per motum..." September 1693; L'HOSPITAL, Guillaume. "Problematis a Joh. Bernouilli in hisce actis mense..." September 1693. -- "Excerptum ex epistola GGL cui pracedens meditatio fuit inclusa," October 1693. -- "De novo uso centri gravitatis ad dimensiones et speciatim pro areis inter curvas parallelis," November 1695. -- "Epistola GGL ad V. Cl. Christianum Wolfium," Supplement 1721. -- "Principia philosophiae," Supplement 1723. Together 20 extracts (all by Leibniz except as noted). (20)